National Weather Service Forecast for: San Marcos CA
Issued by: National Weather Service San Diego, CA
Updated: 9:23 am PDT Apr 26, 2025
 
Today

Today: A chance of showers. Mostly cloudy, with a high near 60. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Chance
Showers
 Tonight

Tonight: A chance of showers, mainly after 11pm. Mostly cloudy, with a low around 48. Southwest wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Chance
Showers
 Sunday

Sunday: Mostly sunny, with a high near 61. West wind 5 to 15 mph, with gusts as high as 20 mph.
Mostly Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 48. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Partly Cloudy
 Monday

Monday: Mostly sunny, with a high near 65. Light and variable wind becoming west 5 to 10 mph in the morning.
Mostly Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 50.
Mostly Clear
 Tuesday

Tuesday: Sunny, with a high near 70.
Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52.
Patchy Fog
 Wednesday

Wednesday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 71.
Patchy Fog
then Sunny
Hi 60 °F Lo 48 °F Hi 61 °F Lo 48 °F Hi 65 °F Lo 50 °F Hi 70 °F Lo 52 °F Hi 71 °F

 

Today
 
 A chance of showers. Mostly cloudy, with a high near 60. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
 
 A chance of showers, mainly after 11pm. Mostly cloudy, with a low around 48. Southwest wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
 
 Mostly sunny, with a high near 61. West wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday Night
 
 Partly cloudy, with a low around 48. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Monday
 
 Mostly sunny, with a high near 65. Light and variable wind becoming west 5 to 10 mph in the morning.
Monday Night
 
 Mostly clear, with a low around 50.
Tuesday
 
 Sunny, with a high near 70.
Tuesday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52.
Wednesday
 
 Patchy fog before 11am. Otherwise, mostly sunny, with a high near 71.
Wednesday Night
 
 Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 51.
Thursday
 
 Patchy fog. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 70.
Thursday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 52.
Friday
 
 Mostly sunny, with a high near 70.

 

Forecast from NOAA-NWS for San Marcos CA.